Im trying to use 2 of those SEN0311 at once for one code program. can anyone help out? Im stuggling with the codes. Here is my current codes:

/*

*@File : DFRobot_Distance_A02.ino

*@Brief : This example use A02YYUW ultrasonic sensor to measure distance

* With initialization completed, We can get distance value

*@Copyright [DFRobot](https://www.dfrobot.com),2016

* GUN Lesser General Pulic License

*@version V1.0

*@data 2019-8-28

*/

#include <SoftwareSerial.h>

SoftwareSerial A02YYUWsensorSerial(11,10); // RX1, TX1

SoftwareSerial A02YYUWsensorSerial1(6,5); // RX1, TX1

unsigned char data[4]={};

unsigned char data1[4]={};

float distance;

float distance1;

const int relay = 7;

const int relay1 = 4;

void setup()

{

Serial.begin(9600);

A02YYUWsensorSerial.begin(9600);

A02YYUWsensorSerial1.begin(9600);

pinMode(relay, OUTPUT);

pinMode(relay1, OUTPUT);

}

void loop()

{

do{

for(int i=0;i<4;i++)

{

data[i]=A02YYUWsensorSerial.read();

data1[i]=A02YYUWsensorSerial1.read();

}

}while(A02YYUWsensorSerial.read()==0xff && A02YYUWsensorSerial1.read()==0xff);

A02YYUWsensorSerial.flush();

A02YYUWsensorSerial1.flush();

if(data[0]==0xff && data1[0]==0xff)

{

int sum, sum1;

sum=(data[0]+data[1]+data[2])&0x00FF;

sum1=(data1[0]+data1[1]+data1[2])&0x00FF;

if(sum==data[3] && sum1==data[3])

{

distance=(data[1]<<8)+data[2];

distance1=(data1[1]<<8)+data1[2];

if(distance>50 && distance1>50)

{

Serial.print("Left side - distance=");

Serial.print(distance/10);

Serial.println("cm");

Serial.print(" Right side - distance=");

Serial.print(distance1/10);

Serial.println("cm");

digitalWrite(relay,LOW);

digitalWrite(relay1,LOW);

}

if (distance<50 && distance1>50)

{

Serial.println("Left side-Below the lower limit");

digitalWrite(relay,HIGH);

digitalWrite(relay1,LOW);

}

else if (distance>50 && distance1<50)

{

Serial.println("Right side -Below the lower limit");

digitalWrite(relay1,HIGH);

digitalWrite(relay,LOW);

}

else if (distance<50 && distance1<50)

{

Serial.println("Both side -Below the lower limit");

digitalWrite(relay1,HIGH);

digitalWrite(relay,HIGH);

}

else Serial.println("ERROR");

}

delay(100);

}

}